Submission #30087325

---

Source Code Expand

// #include <atcoder/all>
// using namespace atcoder;
// using mint = modint998244353;
// using mint = modint1000000007;
#include <bits/stdc++.h>
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define rep2(i,k,n) for (int i = (k); i < (n); ++i)
using namespace std;
using ll = long long;
// using P = pair<ll,ll>;
using P = pair<int,int>;
using vint = vector<int>;
using vll = vector<ll>;
using vvint = vector<vector<int>>;
using vvll = vector<vector<ll>>;

// const ll INF = (ll)2e18+9;
const int INF = (int)2e9+7;
// const ll MOD = (ll)1e9+9;
template<typename T>
void chmin(T &a, T b) { a = min(a, b); }
template<typename T>
void chmax(T &a, T b) { a = max(a, b); }

template<typename T>
void print(vector<T> v) {
    int n = v.size();
    rep(i,n) {
        if (i == 0) cout << v[i];
        else cout << ' ' << v[i];
    }
    cout << endl;
}

void solve() {
    ll n, x;
    cin >> n >> x;
    string s;
    cin >> s;

    string mv = "";
    rep(i,n) {
        if (mv.size() != 0 && mv.back() != 'U' && s[i] == 'U') mv.pop_back();
        else mv.push_back(s[i]);
    }

    ll ans = x;
    for (char c : mv) {
        if (c == 'U') ans /= 2;
        if (c == 'L') ans *= 2;
        if (c == 'R') ans = ans * 2 + 1;
    }
    cout << ans << endl;
}

int main() {
    solve();
    return 0;
}

Submission Info

Judge Result